METHOD OF MAKING SECTIONAL BODIES CONSISTING OF COMPONENT SECTIONS AND SECTIONAL BODIES MADE THEREBY

摘要

The parent patent described process of forming =2 metal strips on shaping tools into partial profiles whose lateral edges are connected by joints obtd. by bending into a shaped hollow section in a single operation. The improvement consists in that =1 metal strip, on =1 of its surfaces, or in its entirety, is of a different material from that of the other strip(s), whicha re pref. Al. (Stainless) steel or a synthetic material may be used with Al to form the hollow section.